v PLATYHELMINTHES 1 1 3 



89 B) appear over the region occupied by the apical cells of the 



B 



6 



FIG. 89. A, dorsal, and B, veutral views of larva of Yungia aurantiaca in which 



metamorphosis is beginning. (After Lang.) 



oc, eyespots. 



B 



6 



FIG. 90. A, dorsal, and B, ventral views of larva of Yungia aurantiaca in which 

 metamorphosis is almost complete. 



embryo, and the ciliated lobes become less and less prominent 



VOL. I I 



